Mold for building-blocks.



No, 775,940. PATBNTED Nov. 29, 1904. J.P.SHERER.

MOLD PoR BUILDING BLUGKS.

APPLICATION FILED MAY 20, 1904.

N0 MODEL.

liliuirin @frisse Patented November 29, i904..

amparar l Oprima.

JOSEPH P. SHERER, OF MlLVVAUKEE, VISOONSlN, ASSlG-NOR TO NATIONALBULDING BLOCK COMPANY, OF MlLVVAUKlGlC, Wit-3- CON SIN, A CORPORATION OFVISCONSI'N.

NIOILU FOR BUlILDlNGMBLOMS..

SPECIFICATION forming part of Letters Patent No. 775,940, dated November29, 1904.

Application filed May Z0, 1904.

Be it known that l, JosinrH l). Sinterama citizen oi' the VUnitedStates, residing' at Milwauhee, in the county of Milwaukee and State oiVViScOnsn, have invented certain new and useful improvements in Moldsfor Buildingl- Blocks, oi' which the following is a specilication,reference being had to the accompanying drawings, forming a partthereof.

.llhe main object ot' this invention is to provide a mold of simpleconstruction and oper ation with interchangeable parts for making avariety oit' concrete buildingeblocks.

lt consists in certain novel features 0i' construction and in thepeculiar arrangement and combinations of parts hereinafter particularlydescribed, and pointed out in the claims.

ln the accompanying' drawings like letters designate the same parts inall the iigures.

Figure l is a plan View of a mold, partially opened, embodying theinvention; Fig. 2 is a trent view; and Figs. 3 and 4i are end views asseen from the left and right, respectively, with reference to Figs. land 2.

The mold comprises three distinct members-a iront plate a, an end plateZ), and a back plate c. The back plate is formed with oppositely-tnrnedlimbs Z and a, the limb Z forming one end oi the mold and the `limb cbeing longer than the limb Z and terminating' in an extension f parallelwith the body or main portion oi' the plate. Otsets forming verticalrecesses or channels g and 71, in the inner tace of the back plate areusually made, the channel g being about midway between the ends of theplate and the channel la, next to the shorter limb (Z.

The front plate a is formed at one end with a pair of perforated ears a'z', which are fitted between corresponding ears jj on the limb CZ of theback plate and are detachably connected therewith by a removablehinge-pin Zr.

The end plate b is also formed at one end with a pair of perforated earsZ Z, fitted between corresponding ears fm, 'mi on the other end o't theback plate and detachably connected therewith by a removable hinge-pinn.

lfhe mold is open at the top and bottom,

Serial No. 208,792. (No model.)

and the plates oil which it is composed are preferably cast with ribs orl'laliges, as shown, to give them the necessary strength and rigid itywithout unduly increasing their weight.

The hinged liront and end plates n, and are arranged to close togetherat the ends opposite their hinged ends perpci'u'licular o1' at rightangles to each other and are provided with a suitable fastening lorsecurely holding them together when the mold closed. This fastening mayconsist, as shown, oi a notched lug o, iornied on one oi: the plates,and an eyebolty), pivoted between cars on the outer face of the otherplate in position to be turned into and out oi' engagement with thenotch in said lug and provided with a handle-nut Q or other suitableclamping device.

To prevent the plates a and 7 from springing out of place when the moldis closed and the consequent molding oi" winding or imperi'ect blocks,the end plate l) is provided in its iront edge with dowel-pins r,litting into corresponding' holes' in the front plate fr when the moldis closed.

By making the iront and end plates a and detachable from the back platec a number of interchangeable front and end plates having their innerfaces variously formed to mold bloclsresembling smooth andrough stone,brickwork, zc., may be provided. and used. with a single-standard baci;plate.

Blocks of dili'erent dimensions may be i'ormed in the same mold byinserting in the ends ofthe moldcavity wood or metal blocks of differentdimensions, the mold being' constructed to form building-blocks of thelargest dimensions that may be required without such filling-blocks.rlhus by providing a number of interchangeable front and end plates anda number of lilling-blocks ol d iilierent dimensions a great variety oi'building-blocks may be made in the mold without unnecessary duplicationoit' parts.

In operation the mold is placed on a smooth l'loor, board, or othersupport, which serves as a bottom wall or closure :lior the mold-cavity.The hinged l'ront and end plates a and 7; being closed and securedtogether by the fastening, as shown in Fig. 3, the mold is filled withconcrete or other plastic material, which is tamped or pressed into themoldcavity. To facilitate the filling of the mold, a removable hopper,which is not shown, may be provided. After it has been filled to the topthe hopper is removed and the excess of concrete or other material isremoved by means of a trowel or other suitable instrument iush with theupper edges of the mold. The front and end plates a and b are thenunfastened and swung outwardly and the mold is removed from the blockthus formed. The blocks may be left where they are formed, the moldbeing progressively moved from place to place, or they may be molded onboards or trays and taken away to a storageroom or other convenientplace to dry and harden.

Then the front and end plates (t and b are recessed or indented in theirinner faces to imitate rough stone or produce raised portions on theexterior faces of the building-blocks, the hinging of said plates to theback plate admits of their being swung outwardly from the molded blocksand of the removal of the mold therefrom without mutilating or injuringprojecting portions of the molded exterior faces of the blocks.

Various changes in the details of construction and in the conformationof the component parts of the mold may be made to adapt it to moldingbuilding-blocks of various sizes and forms and in imitation of variousmaterials.

I claim# l. A mold for building-blocks comprising three members, two ofwhich are hinged to the other at diagonally opposite corners of the moldand are provided with a fastening at the ends opposite the hinges,substantially as described.

2. A mold for building-blocks comprising a generally L-shaped plateconstituting the back and narrower end of the mold and front and endplates hinged to opposite ends of said L-shaped plate at diagonallyopposite corners of the mold, substantially as described.

3. A mold for building-blocks comprising a back plate havingoppositely-turned transverse limbs at the ends, the rearward limb beinglonger than the forward limb, and front and end plates hinged to theends of the back plate at diagonally opposite corners of the mold,substantially as described.

4. A mold for building-bloclis comprising a back plate open at the topand bottom and having a transverse limb forming one end of the mold, afront plate hinged at'one end to the end of said limb and an end platehinged at one end to the other end of the baci; plate, substantially asdescribed.

5. A mold for building-blocks comprising a back plate having at the endsoppositelyturned transverse limbs one of which is longer than the otherand has an extension parallel with the body of the plate, and oifsetsforming Vertical channels or recesses in the inner face of the plate,one next to its shorter limb and the other between its ends, and frontand end plates hinged to the ends of the back plate, substantially asdescribed.

6. A mold for building-blocks comprising a back plate having atransverse limb forming one end of the mold and front and end plateshinged to the ends of the back plate so as to close at right angles toeach other, and provided one with dowel-pins fitting into correspondingholes in the other and with a. fastening' for holding them together whenthe mold is closed, substantially as described.

In witness whereof I hereto afhx my signature in presence of twowitnesses.

JOSEPH P. SHERER.

ldfitnesses:

CHAs. L Goss, BERNARD C. RoLoFF.

